\documentclass[12pt,onecolumn]{report}

\usepackage{amsthm} 
\usepackage{amsfonts}
\usepackage{amsmath}


\begin{document}


\newtheorem{Thrm}{Theorem} % environment for Theorems
\theoremstyle{definition}
\newtheorem{Def}{Definition} % environment for Definitions
\newtheorem{eg}{Example} % environment for Examples
\newtheorem{Corollary}{Corollary} % environment for Corollary
\newtheorem{Lemma}{Lemma}

%\include{cover_page}
%\include{abstract}
%\include{May_report}
%\include{June_report}
%\include{Cantor_Zassenhaus}
%\include{Automorphisms}
\include{August_report}
\include{bib}

\end{document}
